Chair control unit



FIG. 1 is a front top perspective view of a chair control unit embodying my new design;

FIG. 2 is a side view of a chair control unit, as seen from the left hand side;

FIG. 3 is a rear view of a chair control unit; and

FIG. 4 is a bottom plan view of a chair control unit. 

The ornamental design for a chair control unit, substantially as shown and described. 